Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
(D401) LIN 1 BUS CIRCUIT OPEN
1. Turn the ignition off.
2. Disconnect the Switch Bank Module harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (D401) LIN 1 BUS circuit at the Switch Bank Module harness connector.
  Is the voltage above 5.0 volts?
  
  Yes
  - Go To 3
  No
  - Repair the (D401) LIN 1 BUS circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to MODULE, BODY CONTROL, REMOVAL .
(A938) FUSED B(+) CIRCUIT OPEN
1. Measure the voltage of the (A938) Fused B(+) circuit at the Switch Bank Module harness connector.
  Is the voltage above 10.0 volts?
  
  Yes
  - Go To 4
  No
  - Repair the (A938) Fused B(+) circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to MODULE, BODY CONTROL, REMOVAL .
(Z911) GROUND CIRCUIT OPEN
1. Measure the resistance between ground and the (Z911) Ground circuit at the Switch Bank Module harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Repair the (Z911) Ground circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to MODULE, BODY CONTROL, REMOVAL .
  No
  - Replace the Switch Bank Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to MODULE, BODY CONTROL, REMOVAL .